The design of the LIM2000 incorporates a true communications signal repeater. There are two ports to the repeater, the "A" and "B" sides. The signal is isolated, and then boosted in strength from one side to the other, in a bi-directional fashion. Typically, a given lab's network controller is connected to the main network trunk. The main trunk connects all LIMs to one another, and to the front end computer. Due to the isolation provided by each LIM to its respective lab, if there is a failure in the lab network, the main network remains unaffected. The LIM can also be used as an in-line repeater for boosting the signal over long distances. Each repeater boosts the communications signal sufficiently to allow up to 500' of cable run to the next device. Terminating resistors are provided on-board for both the "A" and "B" sides of the repeater, and are jumper-selected as required at each unit once installed. A 9-pin, female DIN receptacle on the bottom of the unit provides user access to the SmartLab network. Any controller on the network can be accessed from this point in the system. Diagnostics and programming can be performed on-line without disturbing the operation of the rest of the network's controllers.
The temperature sensor in the LIM2000 is a 10,000 ohm T3 thermis- tor, which can connect directly to analog input 1 or 2 on a SmartLab SLC2000Controller. The SLC2000 inputs can be jumper-selected to accept the thermistor signal directly, eliminating the need for an electronic transmitter.

.Applications
The LIM2000 is provided in each lab in the SmartLab network and provides a point to configure the lab controls. The LIM2000 also acts as a repeater, allowing isolation of the network trunk. In addition, the LIM2000 houses a temperature sensor that can connect directly to the SmartLab Controller input for measurement of lab temperature.

The Lab Interface Module (LIM2000) is designed solely for use with the Tek-Air Systems SmartLab Control System. Typically, one is provided in each lab in the SmartLab network and provides a point to configure the lab controls. The LIM2000 also acts as a repeater, allowing isolation of the network trunk. In addition, the LIM2000 houses a temperature sensor that can connect directly to the SmartLab Controller input for measurement of lab temperature.